Wrench.



H. C. SHAMBLIN.

WRENCH.

APPLICATION FILED NOV-6,1915.

Patented Apr. 11,1915;

Tn; COLUMBIA PLANOORAPH cm, WASHINGTON. D. c.

HARVEY C. SHAMIBLIN, OF COMMERCE, OKLAHOMA.

WRENCH.

Specification of Letters Patent.

Patented Apr. 11, 1916.

Application filed November 6, 1915. Serial No. 59,895.

To all whom it may concern:

Be it known that I, HARVEY C. SHAMBLIN, a citizen of the United States, residing at Commerce, in the county of Ottawa and State of Oklahoma, have invented certain new and useful Improvements in renches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to adjustable wrenches for pipes and nuts; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a side view of a wrench constructed according to this invention. Fig. 2 is a longitudinal section taken on the line 00-00 in Fig. 1. Fig. 8 is a cross-section taken on the line y-y in Fig. 1.

The two aws of the wrench 2 and 3 are variously shaped so that they will engage with pipes or nuts. The non-slidable jaw 2 has a shank a which is pivoted on a pin 13 in a handle 5. The other jaw 3 which is adjustable is provided with a shank 6 which is slidable longitudinally in the handle 5 parallel to the shank 1. The handle 5 is formed of any suitable metal, and it has a chamber 7 formed on one side portion of it near its upper end. A pawl 8 is arranged in the chamber 7, and is pivoted at its middle part on a pin 9.

A toothed rack 10 is formed in one side of the slidable shank 6, and is arranged to work under the pawl 8. The teeth of the rack are ratchet-shaped and they are countersunk in the shank so that their points do not project above the level of the side of the shank, and a spring 12 is provided for normally holding the pawl in engagement with the rack teeth. This construction enables the shank to slide in contact with the sides of the handle and prevents it from moving sidewise when a portion of the rack projects from the handle.

A push button 14 is provided, and is slidable in a hole in the side of the chamber over the upper end portion of the pawl, and this'button has a head 15 on it inside the chamber, which head bears against the pawl and retains the push button in its guide hole. The handle has a hole or opening 16 in its opposite side so that thebutton may be inserted in its guide hole, the entrance hole 16 being a little larger than the head 15.

The pawl is raised by pressing the button 14, and the slidable shank is then slid by hand to any desired position. A stifiening bar 18 is secured in the handle below the pivoted shank, or it may be formed integral with the handle, and the slidable shank slides in contact with this bar. A small spring 20 is arranged between the upper end portions of the two shanks, and permits the pivoted shank to move a little toward the slidable shank when the wrench is being used. The pivoted shank has a stop 21 on it which engages with the top edge of the handle, and prevents the pivoted shank from being moved in the reverse direction. This spring connection of the two shanks is found to be advantageous in using the wrench, and particularly in using it for pipes. The jaw 3 can be slid toward the jaw 2 without pressing the button, but it is prevented by the pawl from sliding in the reverse direction until the pawl is raised. The rack is formed at the middle part of the shank leaving broad guide surfaces at its edges.

What I claim is:

1. In a wrench, a handle, a non-slidable jaw provided with a shank which is pivoted in the upper end portion of the handle, an adjustable jaw provided with a shank which is slidable longitudinally in the handle and which has a toothed rack on one side, a pawl pivoted to the handle and engaging with the said rack, a push button for operating the pawl slidable in the handle and arranged at its upper end portion substantially in line with the pivot of the pivoted shank.

2. In a Wrench, a tubular handle having an internal stiiiening bar which extends for the greater portion of its length, said handle having also a laterally projecting chamber upon one side of its upper end portion, a

and engaging with the toothed rack, and a push button for operating the said pawl ar ranged in the said chamber substantially in line With the pivot of the pivoted shank.

In testimony whereof I have afiixed my signature.

HARVEY C. SI-IAMBLIN.

jaw provided with a shank which is pivoted in the handle above the top of the stiffening bar, a jaw provided with a shank which is slidable longitudinally in the handle to one 5 side of and in contact with the stiffening bar and which has a toothed rack, a retractable stop pawl pivoted in the said chamber Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. (2. 

